Spirit-level.



N0. 69|,063. Patented Ian. l4, I902.

D. LESH.

SPIRIT LEVEL.

(Application filed May 17, 1901..

(No Model.)

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UNITE.

IIALF TO D. L. KAUFMAN, OF

SPIRIT- HIGHSPIRE, PENNSYLVANIA.

LEVEL.

SPEGIFIGA'IION forming part of Letters Patent No. 691,063, dated January 14, 1902.

Application filed May 17,1901.

T0 on whom, it may concern:

Be it known that I, DANIEL LESH, a citizen of the United States, residing at West Fairview, in the county of Cumberland and State of Pennsylvania, have invented certain new and useful Improvements in Spirit-Levels, of which the following is a specification.

My invention relates to improvements in spirit-levels, and is used, first, for the purpose of leveling or plumbing an object or surface when the points to be leveled or plumbed are some distance apart; second, to procure a more accurate result by covering a greater area of the surface, and, third, when obstructions on the surface will not admit of the ordinary spirit-level.

Figure 1 represents a perspective view of my improved spirit-level. Fig. 2 represents an end view. Fig. 3 represents a side view open and ready for use, and Fig. 4 represents a side view closed.

Similar letters refer to different views.

A represents the level, in which is set the alcohol-filled glass tubes, one at right angles to the other, having a dovetail groove worked in the bottom and extending from each end to the center base.

13 B represent the two slides having the dovetail tongues worked in the bottoms.

O 0 represent the two slides with dovetail tongues worked on the top only.

a and 19 represent the alcohol-filled tubes, one at right angles to the other, as is common in devices of this kind.

0 c and d d represent thumb-screws used to similar parts on the Serial No. 60,658. (No model.)

hold the slides in position, and e e represent the dovetail tongues on the slides.

My improvement is in constructing the level in a series of slides held together by dovetail tongues working in dovetail grooves which will admit of drawing apart and held rigidly by means of the thumb-screws,whereby a twofoot level can be drawn apart to cover a surface of five feet.

What I claim as new is 1. The herein-described spirit-level consisting of a central portion having depending part forming a base and extensions horizontally disposed from the top thereof, the alcohol-filled glass tubes in said central portion over said base, and a series of slides dovetailed to slide one upon the other and upon and beneath the extensions of the central portion, substantially as described.

2. The herein-described spirit-level consisting of the central portion comprising a base and rigid lateral extensions projecting in opposite directions from the top thereof, alcohol-filled glass tubes in said central portion, a series of. slides dovetailed to slide one upon the other and in grooves in the under faces of said extensions, and set-screws for holding the slides in their distended and closed positions, all substantially as shown and described.

In testimony whereof I have affixed my signature in presence of two witnesses...

DANIEL LESH.

Witnesses:

D. L. KAUFMAN, E. C. HUMMEL. 

